CN212380731U

CN212380731U - Pre-charging distribution device and vehicle

Info

Publication number: CN212380731U
Application number: CN202021222958.2U
Authority: CN
Inventors: 房伟嘉; 程东; 薛鹏辉; 陈明文
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-01-19
Anticipated expiration: 2030-06-28

Abstract

The present disclosure relates to a pre-charging power distribution apparatus and a vehicle, the pre-charging power distribution apparatus including a housing, an electric component, and a bus bar arranged parallel to a thickness direction and extending in a transverse direction, the bus bar having first and second sides opposing each other in a longitudinal direction, and the busbar has relative first end portion and second end portion and mid portion in horizontal, electrical components includes main relay, pre-charge resistance and fuse, main relay is located first side and supplies power output and connects in first end portion, pre-charge relay and pre-charge resistance are located the second side, pre-charge resistance connects in the mid portion, pre-charge distribution unit all is provided with the fuse in first side and second side, the fuse connects in second end portion in parallel, the fuse that is located first side is adjacent to main relay in horizontal arranges, pre-charge relay, pre-charge resistance and the fuse that is located the second side arrange along horizontal interval in proper order. The pre-charging distribution device can reduce the requirement on the installation space.

Description

Pre-charging distribution device and vehicle

Technical Field

The disclosure relates to the technical field of vehicle equipment, in particular to a pre-charging distribution device and a vehicle.

Background

In new energy vehicles such as electric vehicles, the power battery generally supplies power to most of the electric devices of the vehicle, and therefore, the power of the power battery needs to be distributed to the electric devices.

In the related art, a power battery is generally configured with a pre-charging distribution module. The pre-charging power distribution module is designed with a relay (for the sake of distinction from the pre-charging relay hereinafter, the relay is referred to as a "main relay") as an on-off control element of the power distribution circuit, and the main relay circuit is generally provided with a safety device for overload and short-circuit protection. In order to reduce the impact on the product, a pre-charge relay and a pre-charge resistor are also generally designed in the pre-charge power distribution module to pre-charge the X capacitor at the product end.

However, the arrangement of the various electrical components in the pre-charging and distributing module directly determines the volume and size of the pre-charging and distributing module, and therefore, if the pre-charging and distributing module is not designed properly, the pre-charging and distributing module has a high requirement on the installation space of the vehicle.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a pre-charging distribution device capable of reducing the requirement for an installation space.

In order to achieve the above object, the present disclosure provides a pre-charging distribution device having a thickness direction, a lateral direction, and a longitudinal direction perpendicular to each other, and including a housing, an electrical component disposed in the housing, and a bus bar arranged parallel to the thickness direction and extending in the lateral direction, the bus bar having first and second sides opposite to each other in the longitudinal direction, and the bus bar having first and second end portions opposite to each other in the lateral direction and an intermediate portion between the first and second end portions, the electrical component including a main relay, a pre-charging resistor, and a fuse, wherein the main relay is located at the first side and a power supply output terminal of the main relay is connected to the first end portion, the pre-charge relay with pre-charge resistance is located the second side, pre-charge resistance connect in the intermediate part, pre-charge distribution device is in first side with the second side all is provided with the fuse, the fuse connect in parallel in the second end part is located the fuse of first side is in horizontal adjacent to main relay arranges, pre-charge relay, pre-charge resistance and being located the fuse of second side arranges along horizontal interval ground in proper order.

Optionally, the pre-charging distribution device includes an input connector and an output connector, the input connector is connected to the power supply input end of the main relay, and each fuse is far away from one end of the busbar and is connected to the output connector.

Optionally, the power supply input end of the main relay and the power supply output end of the main relay are arranged at an interval in the transverse direction, and the power supply input end of the main relay is located on a side far away from the fuse relative to the power supply output end of the main relay.

Optionally, the pre-charge relay is disposed adjacent to the bus bar, and one side edge of the pre-charge relay, which is away from the bus bar in the longitudinal direction, does not exceed an end of the fuse, which is located on the second side, away from the bus bar in the longitudinal direction, and one side edge of the pre-charge relay, which is away from the fuse in the transverse direction, does not exceed an edge of the main relay, which is away from the fuse in the transverse direction.

Optionally, the pre-charge resistor extends along the longitudinal direction, and one end of the pre-charge resistor, which is far away from the bus bar, is connected to a pre-charge output end of the pre-charge relay through a conducting wire, and a pre-charge input end of the pre-charge relay is connected to the input connector through a conducting wire.

Optionally, the pre-charging distribution device has two opposite top and bottom end faces in a thickness direction, the input connector and the output connector are each configured as an L-shaped metal sheet having a bent portion substantially perpendicular to the thickness direction, and the bent portions of the input connector and the output connector are each exposed on the top end face with respect to the housing.

Optionally, the housing includes a housing body and a housing cover detachably connected to each other, the electrical component is placed in the housing body and is closed by the housing cover, the housing cover has an ear portion extending transversely or longitudinally across the housing body, the ear portion is used for being mounted on a vehicle body, the housing body has a top wall opposite to the housing cover, the outer surface of the top wall is the top end face, the top wall is opened with an opening for the input connecting piece and the output connecting piece to protrude, and the surface of the housing cover facing the top wall is configured with a first limit projection structure for restricting the main relay to move relative to the housing and a second limit projection structure for restricting the pre-charge relay to move relative to the housing.

Optionally, the pre-charging distribution device comprises an external low-voltage wiring port connected to a side of the housing, and an opening of the external low-voltage wiring port faces to a side where the top end face is located.

Alternatively, the fuse is configured to be flat and arranged parallel to the thickness direction and extending in the longitudinal direction.

According to a second aspect of the present disclosure, there is provided a vehicle comprising a pre-charged power distribution apparatus as described above.

Through the technical scheme, in the pre-charging distribution device provided by the disclosure, all electric devices are connected together by designing the bus bar, so that on one hand, the normal construction of a circuit can be ensured, and the pre-charging distribution device has a required function, on the other hand, in terms of arrangement, firstly, the main relay, the pre-charging resistor and the fuse are tiled and distributed on two sides of the bus bar, and any two of the main relay, the pre-charging resistor and the fuse do not have a laminated relation in the thickness direction, so that the size of the pre-charging distribution device in the thickness direction can be effectively reduced, and the; the fuses on two sides of the bus bar are arranged to extend in the longitudinal direction, and the fuse on the first side is adjacent to the main relay in the transverse direction, so that the gap between the fuses and the main relay in the transverse direction can be reduced, the compact arrangement between electric devices is facilitated, the utilization rate of the inner space of the shell is improved, and the requirement of reducing the transverse dimension can be met in the aspect of the external dimension; thirdly, the fuse is arranged close to the edge, so that heat dissipation is uniform, redundant heat is not accumulated, and the working efficiency of the pre-charging power distribution module is improved. Therefore, through the flattening design of the pre-charging distribution device provided by the disclosure, the aim of reducing the requirement of the installation space can be achieved, the utilization rate of the available space of the vehicle is improved, and meanwhile, the use performance of the pre-charging distribution device can be considered.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a pre-charged power distribution apparatus provided in accordance with an embodiment of the present disclosure, wherein a housing and a cover are separated from an electrical device;

fig. 2 is a schematic structural diagram of a pre-charging distribution apparatus provided in accordance with an embodiment of the present disclosure, wherein a bus bar and an input connector are separated from a main relay;

fig. 3 is a schematic view illustrating an assembly of an electrical component and a bus bar in the pre-charging distribution apparatus according to the embodiment of the disclosure;

fig. 4 is an assembly schematic diagram of a pre-charged power distribution apparatus provided according to an embodiment of the present disclosure.

Description of the reference numerals

10-shell, 101-shell, 1011-opening, 102-shell cover, 1021-ear, 1022-first limit protrusion structure, 10221-first limit plate, 10222-second limit plate, 1023-second limit protrusion structure, 10231-stop protrusion, 1-main relay, 11-power supply input end, 12-power supply output end, 2-pre-charge relay, 21-pre-charge input end, 22-pre-charge output end, 23-metal connecting sheet, 24-third limit plate, 3-pre-charge resistor, 4-fuse, 5-bus bar, 6-input connecting piece, 7-output connecting piece, 8-external low-voltage wiring port and 100-bending part.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the terms "longitudinal direction," lateral direction, "and thickness direction" used in the present disclosure correspond to the X direction, the Y direction, and the Z direction in fig. 1, respectively, and "top and bottom" are defined based on the thickness direction, that is, the Z direction in fig. 1, specifically, one side indicated by an arrow in the Z direction is a top (also corresponds to the "upper" orientation), and the other side is a bottom (also corresponds to the "lower" orientation). The terms "first and second" are used herein to distinguish one element from another, and are not necessarily order nor importance. Further, in the following description, when referring to the drawings, the same reference numbers indicate the same or similar elements.

According to an embodiment of the present disclosure, there is provided a pre-charging distribution apparatus, as shown in fig. 1, 2 and 4, the pre-charging distribution apparatus having a thickness direction, a lateral direction and a longitudinal direction perpendicular to each other, and the pre-charging distribution apparatus including a housing 10, an electrical component provided in the housing 10, and a bus bar 5, the bus bar 5 being arranged parallel to the thickness direction and extending in the lateral direction, the bus bar 5 having first and second sides opposite to each other in the longitudinal direction, and the bus bar 5 having first and second end portions opposite to each other in the lateral direction and an intermediate portion between the first and second end portions, the electrical component including a main relay 1, a pre-charging relay 2, a pre-charging resistor 3 and a fuse 4, wherein the main relay 1 is located at the first side and a power supply output terminal 12 of the main relay 1 is connected to the first end portion, the pre-charging relay 2 and the pre-charging resistor 3 are located at the second side, the pre-charging resistor 3 is connected to the middle portion, the pre-charging distribution device is provided with fuses 4 at both the first side and the second side, the fuses 4 are connected in parallel to the second end portion, the fuse 4 located at the first side is arranged adjacent to the main relay 1 in the transverse direction, and the pre-charging relay 2, the pre-charging resistor 3 and the fuse 4 located at the second side are sequentially arranged at intervals in the transverse direction.

Through the technical scheme, in the pre-charging distribution device provided by the disclosure, all electric devices are connected together by designing the bus bar 5, on one hand, the normal construction of a circuit can be ensured, so that the pre-charging distribution device has a required function, on the other hand, in terms of arrangement, firstly, the main relay 1, the pre-charging relay 2, the pre-charging resistor 3 and the fuse 4 are tiled and distributed on two sides of the bus bar 5, and any two of the main relay, the pre-charging relay 2, the pre-charging resistor 3 and the fuse 4 do not have a laminated relation in the thickness direction, so that the size of the pre-charging distribution device in the thickness direction can be effectively reduced; secondly, the fuses 4 on two sides of the bus bar 5 are arranged to extend in the longitudinal direction, and the fuse 4 on the first side is adjacent to the main relay 1 in the transverse direction, so that the gap between the two in the transverse direction can be reduced, the compact arrangement between electric devices is facilitated, the utilization rate of the inner space of the shell is improved, and the requirement of reducing the transverse dimension can be met in the aspect of the external dimension; thirdly, the fuse 4 is arranged close to the edge, so that heat dissipation is uniform, redundant heat is not accumulated, and the working efficiency of the pre-charging power distribution module is improved. Therefore, through the flattening design of the pre-charging distribution device provided by the disclosure, the aim of reducing the requirement of the installation space can be achieved, the utilization rate of the available space of the vehicle is improved, and meanwhile, the use performance of the pre-charging distribution device can be considered.

According to the specific embodiment of the present disclosure, referring to fig. 1 and 2, the pre-charging distribution device includes an input connector 6 and an output connector 7, the input connector 6 is connected to a power supply input end 11 of the main relay 1, and one end of each fuse 4 away from the bus bar 5 is connected to the output connector 7. In this way, the input connector 6 can transmit power to the bus bar 5 through the main relay 1, the bus bar 5 will transmit power to the fuse 4, the power is distributed to the load through the output connector 7, the output connector 7 is connected at one end of the fuse 4 far away from the bus bar 5, since the fuse 4 is connected to both the first side and the second side of the bus bar 5, the output connector 7 at the first side and the output connector 7 at the second side are far away from each other, and the load is far away from each other in the longitudinal direction, which meets the arrangement requirement of the vehicle load.

It should be noted that there may be more than one fuse 4 disposed on the first side, and there may also be more than one fuse 4 disposed on the second side, which is not limited in this disclosure.

According to some embodiments, referring to fig. 1 and 2, the power supply input terminal 11 of the main relay 1 is laterally spaced from the power supply output terminal 12 of the main relay 1, and the power supply input terminal 11 of the main relay 1 is located on a side away from the fuse 4 with respect to the power supply output terminal 12 of the main relay 1. In this way, the input connecting piece 6 can be arranged far away from the fuse 4, even if the input connecting piece 6 is far away from the output connecting piece 7, the unnecessary short circuit risk caused by the fact that the input connecting piece 6 is close to the output connecting piece 7 is effectively reduced or even avoided.

According to some embodiments, referring to what is shown in fig. 1 to 3, the pre-charge relay 2 is arranged adjacent to the busbar 5, reducing the lateral clearance of the two; the edge of one side of the pre-charging relay 2, which is far away from the bus bar 5 in the longitudinal direction, does not exceed the end, which is far away from the bus bar 5 in the longitudinal direction, of the fuse 4 on the second side, so that the longitudinal size of the pre-charging distribution device is effectively reduced or even prevented from being increased due to the fact that the pre-charging relay 2 goes beyond the fuse 4 in the longitudinal direction; the edge of one side of pre-charging relay 2 far away from fuse 4 in horizontal is no longer than the edge of main relay 1 far away from fuse 4 in horizontal, effectively reduces or even avoids pre-charging relay 2 to surpass main relay 1 in horizontal and increase the horizontal size of pre-charging distribution device, and the arrangement of pre-charging relay 2 can restrain the increase of horizontal size and the vertical size of pre-charging distribution device effectively promptly.

Alternatively, referring to fig. 3, the pre-charge resistor 3 may extend in the longitudinal direction, and one end of the pre-charge resistor 3 away from the bus bar 5 is connected to the pre-charge output terminal 22 of the pre-charge relay 2 through a wire, and the pre-charge input terminal 21 of the pre-charge relay 2 is connected to the input connector 6 through a wire. In this way, the pre-charging resistor 3 and the power supply output end 12 are both connected to the bus bar 5, that is, the pre-charging relay 2 and the main relay 1 are connected in parallel, and the pre-charging relay 2 and the main relay 1 can be set to be powered on and powered off respectively, for example, when the pre-charging is needed to be performed on the load, the pre-charging relay 2 is powered on, and when the pre-charging is needed to be finished to distribute power to the load, the main relay 1 is powered on, so that the mode conversion between the pre-charging and the power distribution is realized.

According to the embodiment of the present disclosure, the pre-charging and distributing device has two opposite top and bottom end faces in the thickness direction, the input connector 6 and the output connector 7 are each configured as an L-shaped metal sheet having the bent portion 100 substantially perpendicular to the thickness direction, and the bent portions 100 of the input connector 6 and the output connector 7 are each exposed on the top end face with respect to the housing 10. Thus, the bent portions 100 are exposed on the top end surface, and it is possible to facilitate a person to directly and conveniently perform an external wiring operation, i.e., an operation of connecting and assembling the input connector 6 and the output connector 7 with an external electric device.

It should be noted that the term "substantially" used in the present disclosure is intended to mean a non-strict limitation, and for example, "the bent portion is substantially perpendicular to the thickness direction" can be understood as: due to objective factors such as manufacturing errors and mounting errors, the extending direction of the bent portion 100 and the direction perpendicular to the thickness direction have a certain small angle, for example, 0 ° to 5 °, and in this range, the bent portion 100 is still considered to be perpendicular to the thickness direction. The term "substantially" is used to allow a range of offsets to accommodate objective factors such as manufacturing tolerances and installation tolerances.

According to some embodiments, referring to fig. 1, the casing 10 may include a case 101 and a case cover 102 detachably connected to each other, the electric component is placed in the case 101 and is closed by the case cover 102, the case cover 102 has ear portions 1021 extending laterally or longitudinally across the case 101, the ear portions 1021 are adapted to be mounted to the vehicle body, so that the pre-charging distribution device can be mounted to the vehicle body via the ear portions 1021, the case 101 has a top wall opposite to the case cover 102, an outer surface of the top wall is a top end face, so that there is a certain distance between the ear portions 1021 and the above-mentioned bent portion 100 in a thickness direction, and the ear portions 1021 are located on a side different from the top end face, so that an operation of mounting the pre-charging distribution device to the vehicle and a wiring operation have sufficient operating spaces. The top wall is provided with an opening 1011 for the input connecting piece 6 and the output connecting piece 7 to extend out, and the surface of the cover 102 facing the top wall is configured with a first limit convex structure 1022 for restricting the main relay 1 from moving relative to the housing 10 and a second limit convex structure 1023 for restricting the pre-charge relay 2 from moving relative to the housing 10. Like this, trompil 1011 is used for supplying input connecting piece 6 and output connecting piece 7 to stretch out the casing, expose on foretell top terminal surface with output connecting piece 7 with input connecting piece 6, first spacing protruding structure 1022 can retrain main relay 1 and remove relative to shell 10, effectively reduce and avoid even main relay 1 to translocate, second spacing protruding structure 1023 can retrain pre-charge relay 2 and remove relative to the shell, effectively reduce and avoid even pre-charge relay 2 to translocate, guarantee the stability after main relay 1 and the pre-charge relay 2 installation.

According to some embodiments, referring to fig. 1, the first limiting protrusion structure 1022 may include a first boss and a second boss which are longitudinally spaced apart, the first boss may include two first L-shaped limiting plates 10221 which are laterally spaced apart, the two first limiting plates 10221 are symmetrically disposed with respect to the longitudinal direction, the second boss may include two second L-shaped limiting plates 10222 which are laterally spaced apart, the two second limiting plates 10222 are symmetrically disposed with respect to the longitudinal direction, wherein the first limiting plate 10221 and the second limiting plate 10222 are symmetrically disposed with respect to the lateral direction, and the first limiting plate 10221 and the second limiting plate 10222 are matched and are abutted with the side surface of the main relay 1 to restrain the main relay 1 from moving relative to the housing 10.

According to some embodiments, referring to fig. 1 and 3, the pre-charge relay 2 includes a plurality of metal connection plates 23, the plurality of metal connection plates 23 includes the pre-charge input end 21 and the pre-charge output end 22, each metal connection plate 23 is provided at an outer side thereof with a third limit plate 24 extending in a thickness direction, the second limit protrusion structure 1023 may include a stop protrusion 10231 arranged in pair with the metal connection plate 23, and the stop protrusion 10231 cooperates with the third limit plate 24 to restrict the pre-charge relay 2 from moving relative to the housing 10.

According to some embodiments, as shown in fig. 1, 2 and 4, the pre-charging and power-distributing device includes an external low-voltage wiring port 8 connected to a side of the housing 10, the external low-voltage wiring port 8 being opened toward a side where the top end face is located. Thus, the external low-voltage wiring port 8 can be plugged upwards (on top), and the operation is facilitated while the installation and maintenance of the external low-voltage wiring port are facilitated.

According to the specific embodiment of the present disclosure, referring to fig. 1 to 3, the fuse 4 may be configured to be flat and arranged to extend in parallel to the thickness direction and in the longitudinal direction, so that the flat design can increase the heat dissipation area of the fuse 4 itself and can make the heat dissipation uniform at each position, and in the case that the pre-charging resistor 3 extends in the longitudinal direction, the fuse 4 extends in the longitudinal direction and can share the longitudinal space with the pre-charging resistor 3, thereby effectively reducing or even avoiding the fuse 4 from additionally occupying the space in the transverse direction.

According to the specific embodiment of the present disclosure, the power supply output end 12 and/or the pre-charging resistor 3 and/or the fuse 4 are connected to the bus bar 5 in a welding or riveting manner, so as to reduce the resistance value of the connection, and effectively reduce or even avoid overheating of the connection.

According to a second aspect of the present disclosure, there is provided a vehicle including the pre-charged power distribution apparatus as above, and having all the advantages thereof, the disclosure of which is not repeated herein.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A pre-charging distribution device, characterized in that the pre-charging distribution device has a thickness direction, a lateral direction and a longitudinal direction which are perpendicular to each other, and the pre-charging distribution device comprises a housing (10), an electrical component arranged in the housing (10), and a busbar (5), the busbar (5) being arranged parallel to the thickness direction and extending in the lateral direction, the busbar (5) having a first side and a second side which are opposite to each other in the longitudinal direction, and the busbar (5) having a first end portion and a second end portion which are opposite to each other in the lateral direction and an intermediate portion which is located between the first end portion and the second end portion, the electrical component comprising a main relay (1), a pre-charging relay (2), a pre-charging resistor (3) and a fuse (4),

wherein the main relay (1) is located at the first side and a power supply output (12) of the main relay (1) is connected to the first end portion,

the pre-charging relay (2) and the pre-charging resistor (3) are positioned at the second side, the pre-charging resistor (3) is connected to the middle part,

the pre-charging and power distribution apparatus is provided with the fuse (4) at both the first side and the second side, the fuse (4) is connected in parallel to the second end portion,

the fuse (4) on the first side is arranged adjacent to the main relay (1) in the lateral direction,

the pre-charging relay (2), the pre-charging resistor (3) and the fuse (4) located on the second side are sequentially arranged at intervals along the transverse direction.

2. A pre-charging and power distribution arrangement according to claim 1, characterised in that the pre-charging and power distribution arrangement comprises an input connection (6) and an output connection (7), the input connection (6) being connected to a power supply input (11) of the main relay (1), the output connection (7) being connected to an end of each fuse (4) remote from the busbar (5).

3. A pre-charging and power distribution apparatus according to claim 2, characterized in that the power supply input (11) of the main relay (1) is spaced from the power supply output (12) of the main relay (1) in the lateral direction, and the power supply input (11) of the main relay (1) is located on a side away from the fuse (4) with respect to the power supply output (12) of the main relay (1).

4. A pre-charging distribution apparatus according to claim 2, wherein the pre-charging relay (2) is arranged adjacent to the bus bar (5), and one side edge of the pre-charging relay (2) in the longitudinal direction away from the bus bar (5) does not exceed an end of the fuse (4) on the second side in the longitudinal direction away from the bus bar (5), and one side edge of the pre-charging relay (2) in the lateral direction away from the fuse (4) does not exceed an edge of the main relay (1) in the lateral direction away from the fuse (4).

5. A pre-charging distribution device according to claim 4, characterized in that the pre-charging resistor (3) extends in the longitudinal direction, and that the end of the pre-charging resistor (3) remote from the busbar (5) is connected to a pre-charging output (22) of the pre-charging relay (2) by a wire, and that a pre-charging input (21) of the pre-charging relay (2) is connected to the input connector (6) by a wire.

6. A pre-charging and distributing device according to claim 2, wherein said pre-charging and distributing device has two opposite top and bottom end faces in a thickness direction, said input connector (6) and said output connector (7) are each configured as an L-shaped metal sheet having a bent portion (100) substantially perpendicular to said thickness direction, and the bent portions (100) of said input connector (6) and said output connector (7) are each exposed on said top end face with respect to said housing (10).

7. A pre-charging power distribution apparatus according to claim 6, wherein the housing (10) comprises a housing (101) and a housing cover (102) detachably connected to each other, the electric component is placed in the housing (101) and is closed by the housing cover (102), the housing cover (102) has an ear part (1021) extending transversely or longitudinally across the housing (101), the ear part (1021) is used for being mounted on a vehicle body, the housing (101) has a top wall opposite to the housing cover (102), the outer surface of the top wall is the top end surface, the top wall is provided with an opening (1011) for the input connecting piece (6) and the output connecting piece (7) to protrude, and the surface of the housing cover (102) facing the top wall is configured with a first limit projection structure (1022) for restricting the movement of the main relay (1) relative to the housing (10) and a first limit projection structure (1022) for restricting the movement of the pre-charging relay (2) relative to the housing (10) ) And a second stop projection arrangement (1023) for movement.

8. A pre-charging and distributing device according to claim 6, wherein said pre-charging and distributing device includes an external low-voltage wiring port (8) connected to a side of said housing (10), said external low-voltage wiring port (8) being opened toward a side where said top end face is located.

9. A pre-charging and distributing device according to any one of claims 1 to 8, wherein said fuse (4) is configured flat and arranged parallel to said thickness direction and extending in said longitudinal direction.

10. A vehicle comprising a pre-charging and power-distributing apparatus as claimed in any one of claims 1 to 9.